How to Solidify a mesh so I can use it´s measurements to build the object it in real life?
I don't know if I got it right. Do you want to measure the object to ensure that it is not over the limit? (for example, to ensure that an object is not going through the wall)

In this scenario, you can measure the bounding box of the object and compare whether it is exceeding the limits. See this example:

[in this example, the Monkey needs to fit inside the box, this box have 0.8cm and the Monkey needs to be smaller than that. See the "Dimensions", this shows the measurements of the bounding box, so with these values, you can be sure that the Monkey is smaller or not]